Stability AI Stable Image Edit API

openapi: 3.1.0
info:
  title: Stability AI Stable Image Edit API
  description: >-
    The Stability AI Stable Image Edit API provides image editing capabilities
    including inpainting, outpainting, object erasing, background removal, and
    search-and-replace functionality. Developers can use natural language prompts
    to modify existing images, fill in masked regions, extend image boundaries, or
    replace specific objects within a scene. These tools enable advanced image
    manipulation workflows without requiring traditional image editing expertise.
  version: 'v2beta'
  contact:
    name: Stability AI Support
    url: https://platform.stability.ai
  termsOfService: https://stability.ai/terms-of-service
externalDocs:
  description: Stability AI API Documentation
  url: https://platform.stability.ai/docs/api-reference
servers:
  - url: https://api.stability.ai
    description: Production Server
tags:
  - name: Erase
    description: >-
      Remove objects from an image by masking the area to erase and letting the
      AI fill in the background naturally.
  - name: Inpaint
    description: >-
      Fill in masked regions of an image using AI-guided inpainting with text
      prompts to control what appears in the filled area.
  - name: Outpaint
    description: >-
      Extend the boundaries of an image by generating new content that seamlessly
      continues the existing scene in any direction.
  - name: Remove Background
    description: >-
      Automatically detect and remove the background from an image, isolating
      the foreground subject.
  - name: Replace Background and Relight
    description: >-
      Replace the background of an image and adjust lighting conditions using
      AI-powered scene understanding.
  - name: Search and Recolor
    description: >-
      Find specific objects within an image and recolor them using text
      descriptions of the target object and desired color.
  - name: Search and Replace
    description: >-
      Find and replace specific objects within an image using text descriptions
      of what to search for and what to replace it with.
security:
  - bearerAuth: []
paths:
  /v2beta/stable-image/edit/inpaint:
    post:
      operationId: editImageInpaint
      summary: Inpaint a masked region of an image
      description: >-
        Fills in a masked region of an input image using AI-guided inpainting.
        Provide a source image, a mask indicating the region to fill, and a text
        prompt describing what should appear in the filled area. The result
        seamlessly blends with the surrounding image content.
      tags:
        - Inpaint
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/InpaintRequest'
      responses:
        '200':
          description: Successfully inpainted image
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v2beta/stable-image/edit/outpaint:
    post:
      operationId: editImageOutpaint
      summary: Extend an image beyond its boundaries
      description: >-
        Extends an image by generating new content beyond its current boundaries.
        Specify the number of pixels to extend in each direction and optionally
        provide a text prompt to guide the content of the extended regions. The
        generated content seamlessly continues the existing scene.
      tags:
        - Outpaint
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/OutpaintRequest'
      responses:
        '200':
          description: Successfully outpainted image
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v2beta/stable-image/edit/erase:
    post:
      operationId: editImageErase
      summary: Erase an object from an image
      description: >-
        Removes an object or region from an image by providing a mask over the
        area to erase. The AI fills in the erased area with contextually
        appropriate background content that blends naturally with the surrounding
        image.
      tags:
        - Erase
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/EraseRequest'
      responses:
        '200':
          description: Successfully erased object from image
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v2beta/stable-image/edit/search-and-replace:
    post:
      operationId: editImageSearchAndReplace
      summary: Search and replace objects in an image
      description: >-
        Finds specific objects within an image using a text description and
        replaces them with new content described by a prompt. This enables
        targeted object replacement without manually creating masks.
      tags:
        - Search and Replace
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/SearchAndReplaceRequest'
      responses:
        '200':
          description: Successfully replaced objects in image
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v2beta/stable-image/edit/search-and-recolor:
    post:
      operationId: editImageSearchAndRecolor
      summary: Search and recolor objects in an image
      description: >-
        Finds specific objects within an image using a text description and
        recolors them based on a provided prompt. This enables targeted color
        changes to specific elements without affecting the rest of the image.
      tags:
        - Search and Recolor
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/SearchAndRecolorRequest'
      responses:
        '200':
          description: Successfully recolored objects in image
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v2beta/stable-image/edit/remove-background:
    post:
      operationId: editImageRemoveBackground
      summary: Remove background from an image
      description: >-
        Automatically detects and removes the background from an image, isolating
        the foreground subject. Returns the image with a transparent background
        in PNG format or a white background in JPEG format.
      tags:
        - Remove Background
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/RemoveBackgroundRequest'
      responses:
        '200':
          description: Successfully removed background from image
          content:
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v2beta/stable-image/edit/replace-background-and-relight:
    post:
      operationId: editImageReplaceBackgroundAndRelight
      summary: Replace background and adjust lighting
      description: >-
        Replaces the background of an image with new content described by a text
        prompt and adjusts lighting conditions to match the new scene. The
        foreground subject is preserved while the background is regenerated.
      tags:
        - Replace Background and Relight
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/ReplaceBackgroundAndRelightRequest'
      responses:
        '200':
          description: Successfully replaced background and adjusted lighting
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: >-
            Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        API key authentication. Pass your Stability AI API key as a Bearer token
        in the Authorization header.
  schemas:
    InpaintRequest:
      type: object
      required:
        - image
        - prompt
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image to inpaint. Must be a valid image file.
        mask:
          type: string
          format: binary
          description: >-
            A mask image indicating the region to inpaint. White pixels indicate
            areas to fill, black pixels indicate areas to preserve.
        prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing what should appear in the masked region.
        negative_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing elements to exclude from the inpainted region.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: >-
            A value to control randomness in generation.
        output_format:
          type: string
          enum:
            - jpeg
            - png
            - webp
          default: png
          description: >-
            The output format of the edited image.
    OutpaintRequest:
      type: object
      required:
        - image
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image to extend.
        prompt:
          type: string
          maxLength: 10000
          description: >-
            Optional text describing what should appear in the extended regions.
        left:
          type: integer
          minimum: 0
          description: >-
            Number of pixels to extend to the left.
        right:
          type: integer
          minimum: 0
          description: >-
            Number of pixels to extend to the right.
        up:
          type: integer
          minimum: 0
          description: >-
            Number of pixels to extend upward.
        down:
          type: integer
          minimum: 0
          description: >-
            Number of pixels to extend downward.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: >-
            A value to control randomness in generation.
        output_format:
          type: string
          enum:
            - jpeg
            - png
            - webp
          default: png
          description: >-
            The output format of the edited image.
    EraseRequest:
      type: object
      required:
        - image
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image containing the object to erase.
        mask:
          type: string
          format: binary
          description: >-
            A mask image indicating the region to erase. White pixels indicate
            areas to remove, black pixels indicate areas to preserve.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: >-
            A value to control randomness in generation.
        output_format:
          type: string
          enum:
            - jpeg
            - png
            - webp
          default: png
          description: >-
            The output format of the edited image.
    SearchAndReplaceRequest:
      type: object
      required:
        - image
        - prompt
        - search_prompt
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image containing the objects to replace.
        prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing what should replace the found objects.
        search_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing the objects to find and replace in the image.
        negative_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing elements to exclude from the replacement.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: >-
            A value to control randomness in generation.
        output_format:
          type: string
          enum:
            - jpeg
            - png
            - webp
          default: png
          description: >-
            The output format of the edited image.
    SearchAndRecolorRequest:
      type: object
      required:
        - image
        - prompt
        - select_prompt
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image containing the objects to recolor.
        prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing the desired color or appearance change.
        select_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing the objects to find and recolor in the image.
        negative_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing elements to exclude from the recoloring.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: >-
            A value to control randomness in generation.
        output_format:
          type: string
          enum:
            - jpeg
            - png
            - webp
          default: png
          description: >-
            The output format of the edited image.
    RemoveBackgroundRequest:
      type: object
      required:
        - image
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image from which to remove the background.
        output_format:
          type: string
          enum:
            - png
            - webp
          default: png
          description: >-
            The output format of the image. PNG supports transparency for
            background removal.
    ReplaceBackgroundAndRelightRequest:
      type: object
      required:
        - image
      properties:
        image:
          type: string
          format: binary
          description: >-
            The source image whose background will be replaced.
        background_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing the new background scene and lighting conditions.
        foreground_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing any adjustments to the foreground subject.
        negative_prompt:
          type: string
          maxLength: 10000
          description: >-
            Text describing elements to exclude from the result.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: >-
            A value to control randomness in generation.
        output_format:
          type: string
          enum:
            - jpeg
            - png
            - webp
          default: png
          description: >-
            The output format of the edited image.
    EditImageResponse:
      type: object
      properties:
        image:
          type: string
          description: >-
            Base64-encoded image data when Accept header is set to
            application/json.
        finish_reason:
          type: string
          enum:
            - SUCCESS
            - CONTENT_FILTERED
          description: >-
            The reason the edit finished.
        seed:
          type: integer
          description: >-
            The seed used for generation.
    ErrorResponse:
      type: object
      properties:
        id:
          type: string
          description: >-
            A unique identifier for the error instance.
        name:
          type: string
          description: >-
            The error type name.
        message:
          type: string
          description: >-
            A human-readable description of the error.